another problem for damages is the bush for the guide pin for the smaller gear part, when that bush get's damaged, the gears touch each other too much/hard.
Since more than 1 year some of my friends have tested this bush with good success together with the steel gear from me.

Have them on stock, but I am sorry, my toothed wheel will not fit your model, it only fits on E34, E32, E31 and some E38 with production till 1997 model year, some Mercedes and Audi models which were built around 1986-1998, but not for a 2006 E90.

Hi shogun and thanks for reply ! Oh my god, i was sure to repair my motor with your wheel. What can you suggest ? Buy a new one? And if i want to buy a new motor can you suggest were to buy? In italy sell all the sunshade at 500 euro ! it's too much. thanks . i see this on ebay : http://www.ebay.it/itm/291672166497?...%3AMEBIDX%3AIT The motor is identical of mine !

This p/n 16106820701 (in case that is correct for your car what you have selected) is the same on many cars according to realoem http://www.realoem.com/bmw/enUS/partxref?q=16106820701
so there are plenty of used ones available.
Check once more with your vehicle VIN on www.realoem the part number and get a used one. Use the part number and google search with it, many offers for used ones on Ebay etc.

VIN PS41953 is a 08/2006 built E90 3 series 320d. Electric sun blind is 51469149848, the drive motor and gear for this model is not available as single item. My toothed wheel will not fit in an E90 2006 model.
My toothed wheel only fits in E32, E34, E31 and some E38 models built till mid 1996, plus some Audi and Mercedes Benz models of same built years.
It fits on drive BMW part no. 51461388215, http://www.realoem.com/bmw/enUS/part...&q=51461388215